Parashar, A., Gupta, A., Mahajan, N., Barwal, V., Verma, D., Sachdeva, A. and Thakur, S. 2016. Immunization coverage in the district Sirmaur, Himachal Pradesh, India: evaluation using the 30 x 7 cluster sampling technique. International Journal Of Community Medicine And Public Health. 3, 11 (Dec. 2016), 3117–3122. DOI:https://doi.org/10.18203/2394-6040.ijcmph20163921.